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%I #13 Jun 12 2015 15:26:55
%S 1,3,33,387,4161,42243,413793,3959427,37281921,347066883,3204309153,
%T 29403732867,268588249281,2444976817923,22198569382113,
%U 201143570584707,1819787258282241,16444551185679363,148466221699088673
%N 9^n-7^n+1.
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (17,-79,63).
%F G.f.: 1/(1-9*x)-1/(1-7*x)+1/(1-x). E.g.f.: e^(9*x)-e^(7*x)+e^x.
%F a(n)=16*a(n-1)-63*a(n-2)+48 with a(0)=1, a(1)=3 - _Vincenzo Librandi_, Jul 21 2010
%t LinearRecurrence[{17,-79,63},{1,3,33},30] (* _Harvey P. Dale_, Feb 25 2015 *)
%o (PARI) a(n)=9^n-7^n+1 \\ _Charles R Greathouse IV_, Jun 11 2015
%Y Cf. A155638, A155639, A155640, A155641, A155642, A155643, A155644, A155645, A155646, A155647, A155648, A155649, A155650, A155651, A155652, A155653, A155654, A155655, A155656, A155657, A155658, A155659.
%K nonn,easy
%O 0,2
%A _Mohammad K. Azarian_, Jan 31 2009
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